Low-mass dark matter search using ionization signals in XENON100

XENON Collaboration

Research output: Contribution to journalArticle

Abstract

We perform a low-mass dark matter search using an exposure of 30 kg×yr with the XENON100 detector. By dropping the requirement of a scintillation signal and using only the ionization signal to determine the interaction energy, we lowered the energy threshold for detection to 0.7 keV for nuclear recoils. No dark matter detection can be claimed because a complete background model cannot be constructed without a primary scintillation signal. Instead, we compute an upper limit on the WIMP-nucleon scattering cross section under the assumption that every event passing our selection criteria could be a signal event. Using an energy interval from 0.7 keV to 9.1 keV, we derive a limit on the spin-independent WIMP-nucleon cross section that excludes WIMPs with a mass of 6 GeV/c2 above 1.4×10-41 cm2 at 90% confidence level.

Original languageEnglish (US)
Article number092001
JournalPhysical Review D
Volume94
Issue number9
DOIs
StatePublished - Nov 3 2016

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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